Download Security and Cryptography for Networks: 6th International by Shai Halevi (auth.), Rafail Ostrovsky, Roberto De Prisco, PDF

By Shai Halevi (auth.), Rafail Ostrovsky, Roberto De Prisco, Ivan Visconti (eds.)

This publication constitutes the refereed complaints of the sixth overseas convention on defense and Cryptology for Networks, SCN 2008, held in Amalfi, Italy, in September 2008.

The booklet comprises one invited speak and 26 revised complete papers that have been conscientiously reviewed and chosen from seventy one submissions. The papers are equipped in topical sections on Implementations, Protocols, Encryption, Primitives, Signatures, and Cryptanalysis, and Key trade.

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Additional resources for Security and Cryptography for Networks: 6th International Conference, SCN 2008, Amalfi, Italy, September 10-12, 2008. Proceedings

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2 describes the technique of radix-2 exponent splitting, which can be used to obtain shorter exponents by converting exponentiation tasks into multiexponentiation tasks, or converting k-fold multi-exponentiation tasks into k -fold multi-exponentiation tasks with k > k. Radix-2 exponent splitting is a useful technique for fixed bases (namely, for exponentiation or multi-exponentiation with precomputation that can be done in advance). 1 Interleaved Multi-exponentiation We build on the straightforward multi-exponentiation strategy that has been called interleaving in [14], which generalizes well-known methods for single exponentiations such as the (left-to-right) binary or sliding window methods.

This makes it attractive for embedded systems, where ECDSA is a signature scheme of choice. More generally, what we consider is the task of computing power products 1≤i≤k giei (“multi-exponentiation”) where base elements g2 , . , in a finite group). We present a new technique that entails two different ways of computing such a product. The first way applies to the first occurrence of any g1 where, besides obtaining the actual result, we create a cache entry based on g1 , investing very little memory or time overhead.

The AKD’s reply packet is digitally signed as well and the AKD’s public key is preinstalled on all machines. 4, but it requires a kernel patch and does not support dynamically assigned IP addresses. On the basis of S-ARP, Lootah et al. propose Ticket-based ARP (TARP) [16]. It foregoes a central key server and instead employs digitally signed attestations of IP/MAC mappings, so-called tickets. The tickets are issued by a trusted party, the Local Ticket Agent (LTA). The host responding to an ARP request attaches its ticket to the ARP reply and thereby proves the validity.

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